Help! I started doing my own B&W processing about....30 rolls of film ago (or 2 months if you like) and I've just begun to notice this tone inconsistency in my 6x6 negs. It's really apparent in this photo with the clear sky. I'm still new to this and haven't yet seen the common problems. I'm thinking it could be inadequate fixing, but have mixed a new batch of fixer and the problem is still there. I have been shooting Kodak Tmax and Tri-X 400, but the attached photo is on HP5. I am using Kodak Tmax Developer with Kodak stop bath and Kodak Fixer. I am very careful about times and temps, and used all new chemicals for the attached photo. Oh, I have been fixing for 6-8 minutes in 70-72C solution, after developing a 68C for prescribed time. I was concerned about a light leak in the [Hasselblad A12] film back, but this doesn't show up in all framed as far as I can tell. Could someone please take a look at this photo and render an opinion? Thanks much in advance!